Senate Democrats are setting the stage for a vote on new gun laws later this week as two key senators on Tuesday said they were close to announcing a compromise bill to expand background checks to firearms sales at gun shows and on the Internet. Sen. Pat Toomey, a conservative Pennsylvania Republican, announced he plans to appear Wednesday with West Virginia Democratic Sen. Joe Manchin, who holds an A rating from the National Rifle Association. The two have been working on a compromise proposal that could draw Republican support for expanding background checks, and an aide to Toomey said Tuesday...